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SAFETY GEAR EUR STARTING ENGINES.

PatentedDeo. 23, 1.884.

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(No Model.) 2 Sheets-Sheen 2. J. MUSGRAVB 8v A. WALSH.

SAEETY GEAR EOE STARTING ENGINES.

No. 309.557. Patented Dec. 23, 1884.

Unitarian Strait-las Parent Ormea..

JOHN MUSGRAVE AND ARTHUR VATSH, OF BOLTON, COUNTY OF LANCASTER, ENGLAND.

SAFETYPGEAR FOR STARTlNG ENGINES.

SPECIFICATJON forming part of Letters Patent No. 309,557, dated December 23,1884.

Application iilcd October 9,1884. (No model.)

To @ZZ whom ,it may concern:

a new and useful Safety-Gear for Starting En-A gines, (for which we have obtained a patent in Great Britain, No. 3,694, bearing date August 24, 1881,) of which the following is a specification.

Our invention relates to improvements in safety-gear for starting engines; and the object of our :invention is to prevent accidents arising from the startinggear having been left in gear with the iiy-wheel or other wheel of the large engine after the latter has attained its normal speed. Ve attain these objects by the mechanism illustrated in the accompanying two sheets of drawings, in which-mm Figure l is a side elevation, Fig. 2 an end elevation, (the fly-wheel of the large engine being re1noved,) and Fig. 3 a plan, partly in section, of our improved safety startinggear. Fig. 4 is an elevation, and Fig. 5aplan, of our improved safetystarting-geartitted with stops, so that it may be driven in either direction.

Similar letters refer to similar parts throughout the several views.

a is a lever fulcrumed o1' pivoted on t-he revolubleshaftb, on which is keyed or secured a pinion, d, gearing into a .pinion,..c, which is free to turn on a stud, c', at one end of the lever a, tothe other end of which is fixed a handle, a.

c is a catch that swings on astud on thelever a, so that when the lever is raised the catch rests on the framej'.

y g is the fly-wheel or main drum of thelarge engine,providedwith internal teeth,in to which the teeth of the pinion c gear. The shaft b is free to turn in a bearing iixed to the frame f, and on it is keyed a worm-wheel, into which gears a worm that may be turned by a handle or driven by a small engine. instead of a worm and worm-wheel other suitable gearing may be employed for actuating the shaft b. There isa stop-piece, f', fixed to the frame j", against which one end of the lever u. bears when in ahorizontal position,the other Patented in England August 24, 1851, No. 3,6214. l

end of the lever resting on a projecting portion ofthe framef.

When it is desired to start thelarge engine, motion is communicated to the shaft b by hand or by a small engine, and the lever ais moved by the handle a to bring it into a horizontal position. Vhile the shaft b revolves motion is transmitted by the pinion d to the pinion c, and as the lever a approaches the horizontal position the teeth of the pinion c work themselves into gear with the teeth inside the ilywheel or drum g.

hen the engine has been started by these means, and has attained sufficient speed to become the driver instead ofthe driven, itthrows the pinion c out of gear, raising the lever a to the position shown in dotted lines on Fig. l, when the catch e will rest on the projecting portion ofthe frame f and retain the lever in this position till it be again required to start the engine.

In the arrangement illustrated by llii gs. et and 5 the lever a is weighted so as to balance the pinion c. A catch, e, is iitted loosely on a stud connected to the frame, and when the lever a is in the position shown in dottedlines onFig.

above the level of the shaft b, one end of this catch c falls into a recess in a collar, t', fixed to the lever a.

7L 7L are two stop-pieces, one of which is moved below or above the end of the lever a, according to the direction in which the wheel g ofthe large engine is to be turned. These stop-pieces la are pivoted to and connected by the lever k on the fulcrum'stud Z to the starting-handlem` of a small starting-engine. (Not shown on the drawings.) This engine gives motion to a wor1n,which gears into and drives the wormwh eeln, fixed on the shaft b, (see Fig. 5,) and this motion is transmitted by the pinion d to the pinion c. Then the handle m is in the position shown by dotted lines on Fig. 4, the starting-engine will be stopped, and the lever a and the stop-pieces 7L 71. will also occupy the positions shown in dotted lines. If the large wheel g were running in the direction opposite to that indicated by the arrow, the pinion c, when thrown out of gear, would be above the 2i, or in the reverse position, with the pinionc center of the shaft b,instead of below it. The

I catch e will always retain the lever a, either up or down, until it has been released, so that the pinion c cannot get into gear with the wheel g after it has been thrown out of gear.

Ve have shown and described the pinion c applied directly to the fly-wheel or main drum ofthe large engine. It is obvious, however, that it might be applied to other wheels, if more convenient-such as a wheel on the second-motion shaft.

By the use of our invention an engine may be readily started, and the startinggear may be easily and quickly thrown out of gear without noise or jar or any risk of injury to the operator or to the gear.

XVe declare that what we claim and desire to secure by Letters Patent of the United States isl. In startinggear for large engines, the combination, with the iy-wheel, main drum, or other wheel of a large engine, of apinion or starting-wheel actuated by hand or power, the said pinion being so mounted that it may be moved into'gear with the fly-wheel, and be thrown out of gear by the motion ofthe iiywheel when the latter becomes the driver, substantially as and for the purpose herein set forth.

2. The combination, with the driving-wheel g, of the pinion c, fitted on the lever a, provided with a handle, c, catch e, and stop-piece f, and pivoted to a shaft, b, the said pinion c gearing into the pinion d, secured to the said shaft b, which is fitted in bearings in the frame f, and is actuated either by hand or byasmall engine, all substantially as herein shown and described, for the purposes specified.

3. The combination, with the driving-wheel g, of the pinion c, mounted on the weighted balance-lever a and gearinginto the pinion d,

secured to the shaft b, to which is also secured the collar i, provided with recesses for the end ofthe pivoted catch e and the said lever a, the latter retained in position,aceording to the direction in which the wheel gis to be driven, by one or other ofthe stop-pieces h h, connected by the lever k, fnlcrumed at Z to the starting-handle m, all substantially as herein shown and described, for the purposes specified.

The foregoing specification of our improvelnent in safety-gear for starting engines signed by us this 22d day of September, 1884.

JOHN MUSGRAVE. ARTHUR WALSH. Witnesses:

ARTHUR WM. BRoUGH'roN,

Clerk, Bolton. JOHN GRoMPToN,

Engineer. 

